5DLM:
reference: Crystal Structure of the Conserved Amino Terminus of the Extracellular Domain of Matrix Protein 2 of Influenza A Virus Gripped by an Antibody., Cho KJ, Schepens B, Moonens K, Deng L, Fiers W, Remaut H, Saelens X, J Virol. 2015 Oct 14;90(1):611-5. doi: 10.1128/JVI.02105-15. PMID: 26468526

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